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    SubjectCONFIG_HOTPLUG, 2.4.x and ppc
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    I'm dealing with a custom BRIDGE_OTHER chip, which has PCI devices
    on the other side...the configuration cycles don't follow a standard, and
    I'm trying to establish the bus behind the bridge when I install a module...
    essentially I'm doing things similar to hotplug drivers...

    I have no experience with hotplug drivers, but it appears to be incompatible
    with the ppc architure...

    Calling pci_do_scan_bus, it calls pcibios_fixup_bus.

    In the 2.4 ppc kernels, pcibios_fixup_bus is defined to be:
    void __init pcibios_fixup_bus(struct pci_bus *bus)

    On intel, its defined to be:
    void __devinit pcibios_fixup_bus(struct pci_bus *bus)


    Since pci_do_scan_bus needs CONFIG_HOTPLUG, this path is exercised,
    and pcibios_fixup_bus isn't present on ppc after bootup...

    This patch is necessary if we CONFIG_HOTPLUG on ppc...there seems
    to be no reason why not -- others changes like this might be necessary...


    :1 mleisner@santa 04:28:16; rcsdiff -r1.1 -u arch/ppc/kernel/pci.c
    ===================================================================
    RCS file: arch/ppc/kernel/pci.c,v
    retrieving revision 1.1
    diff -u -r1.1 arch/ppc/kernel/pci.c
    --- arch/ppc/kernel/pci.c 2005/05/18 19:08:09 1.1
    +++ arch/ppc/kernel/pci.c 2005/05/24 19:23:33
    @@ -1384,7 +1384,7 @@
    return start;
    }

    -void __init pcibios_fixup_bus(struct pci_bus *bus)
    +void __devinit pcibios_fixup_bus(struct pci_bus *bus)
    {
    struct pci_controller *hose = (struct pci_controller *) bus->sysdata;
    unsigned long io_offset;


    The patch is wrt to 2.4.20, but 2.4.30 appears to have the same problem...




    Marty Leisner
    leisner@rochester.rr.com


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